Posted by Zach on Wednesday, April 21, 2010 at 7:39pm.
How many positive threedigit integers have the property that the tens digit is greater than or equal to the hundreds digit and the ones digit is greater than or equal to the tens digit?
Please help :)
thanks
Zach

Math  jennifer, Wednesday, April 21, 2010 at 8:06pm
9a

Math (need help)  PsyDAG, Thursday, April 22, 2010 at 12:46pm
Let a = hundreds, b = tens, c = ones
a ≤ b ≤ c
Examples of what you are seeking are:
111
112
113...
122
123
124...
133
134
135...
222
223
224...
...999
Unfortunately, I cannot think of an equation to help you solve this problem. Sorry.
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